A Harvard professor apologized for suggesting that Rick Santorum had called all black men “sexual predators” – but he still believes the likely Republican presidential candidate is misusing statistics he compiled in a book on families.

During a speech last week to the socially conservative Cornerstone organization, Santorum cited data from political scientist Robert Putnam’s book, “Our Kids,” to argue that the breakdown of families had turned many poor men into “sexual predators.”

“He compared it when he was growing up in the 1950s and when children were conceived out of wedlock, what happened in the 1950s,” Santorum said. “We all know what happened in the 1950s and here is the amazing thing, this is Putnam saying this, 80 plus percent of these marriages succeeded, and children were raised in stable homes.”

“Now these fathers leave the home, and not just father children with that particular women – they father a child with another women, and another and another,” Santorum added. “We have created predators, sexual predators particularly where, again, Putnam (found) – low-income America.”

Putnam bitterly disputed Santorum’s interpretation of his findings.

“I’m a progressive and I think the evidence is that first of all, there has been a collapse in the working family class family, black and white, and that’s bad for kids,” Putnam said.

“But there is a presidential candidate who yesterday quoted me as saying therefore — he’s quoted me as saying all black men are sexual predators,” Putnam continued.

The scholar said Santorum selectively cited statistics from his book and misattributed other statistics to his research.

However, Putnam “unreservedly” apologized Tuesday to Santorum, saying he had “seriously misquoted” the former U.S. Senator, after a Weekly Standard article labeled his remarks as “slanderous.”